<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>动态组件与v-once指令</title>  
    <script src="./vue.js"></script>
</head>
<body>
    <div id="root">
        <component :is='type'></component>
        <!-- <child-one v-if='type==="child-one"'></child-one>
        <child-two v-if='type==="child-two"'></child-two> -->
        <button @click=handleBtnClick>change</button>
    </div>
    <script>

        Vue.component('child-one',{
            template:'<div v-once>child-one</div>'
        }  
        )

        Vue.component('child-two',{
            template:'<div v-once>child-two</div>'
        }  
        )

        var vm = new Vue({
            el:'#root',
            data:{
                type:'child-one'
            },
            methods:{
                handleBtnClick:function(){
                    this.type = this.type==='child-one'?'child-two':'child-one'
                }
                }
        })
    </script>
</body>
</html>